California Verbal Learning Test CVLTC

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Title: California Verbal Learning Test CVLTC

1
California Verbal Learning TestCVLT-C

2
Overview

Designed to assess the strategies and processes
involved in learning and recalling verbal
material.
Administered to children aged 5 to 16.
Can be used to diagnose and treat memory problems
that are associated with mild to severe learning
disabilities, attention-deficit disorders, mental
retardation, other neurological or psychiatric
disorders.
Measures how verbal learning occurs, or doesnt
occur, as well as the amount of material learned.
Computer scoring is available.

3
Parameters Quantified

4
Parameters Quantified Contd

5
Application

Identifying children with subtle to severe
learning disabilities.
Isolating deficient learning strategies that may
underlie a childs specific learning problems.
Designing remediation programs based on the
childs verbal learning strengths and weaknesses.

6
Administration

Can usually be administered in thirty minutes.
CLVT-C measures recall and recognition of words
over several trials.
The child is asked to recall words that would be
a part of a shopping list from a Monday List
(list A) and a Tuesday List (list B).
The lists include fifteen words with five words
from each of the three semantic categories.
Five trials of list A are administered.
List B is presented as an interference list for
one trial immediately followed by another trial
using List A (short-delay trial).

7
Administration Contd

Next a cued delay recall is administered using
List A.
After twenty minutes of nonverbal testing the
student is asked to recall List A.
Followed by a Long-Delay Cued-Recall trial.
Last trial is Long-Delay Recognition trial.

8
Scoring

Hand scoring is divided into three sections
classification and recording of response types
and conversions of raw scores to scaled scores on
the free-recall and cued-recall trials and
contrast measures calculation of the Learning
Characteristics computation of the Recognition
Measures.
Record each word. Use short hand and fill in the
rest of the words after testing.
Record queries and code Q. (Only one query per
trial)
Record perseveration errors and code P.
Record intrusion errors and code I.
Score one point for each word recalled and one
point for each error.

9
Scoring Contd

Calculations of the Four Contrast Measures
Calculation of the Raw Percentage Change Score
Calculation of Difference Score
Calculation of Learning Characteristics List A
Trials 1-5
Semantic Cluster Indices for List A Trials 1-5
Serial Cluster Ratio for List A Trials 1-5
Calculation of Percentage of correct Responses
from the Primacy Region, Middle Region, and
Recency Region List A Trials 1-5

10
Scoring Contd

11
Technical Properties

Norm group included 920 children in three age
groupings 5 to 8 9-12 and 13-16.
The three age groups were equivalent in terms of
their age-corrected scaled scores on the
Vocabulary subtest of the WISC-R (scaled scores
9.9,9.6, and 9.8)
Demographics were based on the 1998 Census with
regard to age, gender, race/ethnicity, parent
education level and geographic region

12
Reliability and Validity

Reliability
Across-trial consistency .84 to .91
Across-semantic-category consistency .64 to .80
Test-retest stability .90 to .38 (all categories)
Validity
Content-related and Criterion-related- based on
solid research (cognitive science research in
brain/behavior relationships)
Construct related- indices were factor-analyzed
using a principle-components procedure
Correlation with a measure of verbal ability-
WISC-R Vocabulary subtest